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RETIREMENT AND POST RETIREMENT HEALTH CARE PLANS (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Dec. 28, 2019
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]          
Estimated net actuarial loss to be amortized from accumulated other comprehensive loss $ 1.2   $ 1.2    
Estimated prior service cost to be amortized from accumulated other comprehensive loss (0.6)   (0.6)    
Contribution to defined benefit pension plans 1.3 $ 4.1 3.6 $ 9.0 $ 10.8
Expected total contribution to defined benefit pension plans $ 5.6   $ 5.6